I'm trying to build on a budget, so the increased cost of a H2 slab gives me concern that the costs could blow out. Does anyone have a rough idea what the cost increase would be to go from an M-class slab most builders include in their standard pricing, up to a H2 slab? Would be a small-ish house, around 150-180sqm (haven't selected a builder yet).
I've attached the pertinent pages of the soil report if that helps give a more accurate estimate
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